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Search: id:A005468
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| A005468 |
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a(n)=1+a(floor(n/2))*a(ceiling(n/2)).
(Formerly M0649)
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+0
2
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| 1, 2, 3, 5, 7, 10, 16, 26, 36, 50, 71, 101, 161, 257, 417, 677, 937, 1297, 1801, 2501, 3551, 5042, 7172, 10202, 16262, 25922, 41378, 66050, 107170, 173890, 282310, 458330, 634350, 877970, 1215290, 1682210, 2335898, 3243602, 4504302, 6255002
(list; graph; listen)
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OFFSET
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1,2
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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PROGRAM
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(PARI) v=vector(60); v[1]=1; for(k=2, 60, v[k]=v[k\2]*v[(k+1)\2]+1); v [From Franklin T. Adams-Watters (FrankTAW(AT)Netscape.net), Apr 22 2009]
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CROSSREFS
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Sequence in context: A134792 A033068 A052011 this_sequence A104622 A033843 A075657
Adjacent sequences: A005465 A005466 A005467 this_sequence A005469 A005470 A005471
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KEYWORD
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nonn,easy
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AUTHOR
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C. L. Mallows (colinm(AT)research.avayalabs.com)
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EXTENSIONS
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More terms from Franklin T. Adams-Watters (FrankTAW(AT)Netscape.net), Apr 22 2009
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